For me, it's gotta be Splatoon 3.
The more fleshed out campaign and quality of life improvements throughout really elevate the experience; it's got everything I like about 1 and 2, but more of it, and more refined.
The series has always had an incredibly strong core concept, and 3 feels like it does the most of the three to build on it.
Bet with Liquidlaser: I say PS5 and Xbox Series will sell more than 56 million combined by the end of 2023. (And over 130 million lifetime)